90990107 has 24 divisors (see below), whose sum is σ = 106286400. Its totient is φ = 77601888.

The previous prime is 90990091. The next prime is 90990113. The reversal of 90990107 is 70109909.

It is a happy number.

It is not a de Polignac number, because 90990107 - 2⁴ = 90990091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90990127) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 137744 + ... + 138402.

It is an arithmetic number, because the mean of its divisors is an integer number (4428600).

Almost surely, 2^90990107 is an apocalyptic number.

90990107 is a deficient number, since it is larger than the sum of its proper divisors (15296293).

90990107 is a wasteful number, since it uses less digits than its factorization.

90990107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747 (or 734 counting only the distinct ones).

The product of its (nonzero) digits is 5103, while the sum is 35.

The square root of 90990107 is about 9538.8734659812. The cubic root of 90990107 is about 449.7778442538. Note that the first 3 decimals are identical.

The spelling of 90990107 in words is "ninety million, nine hundred ninety thousand, one hundred seven".